< GET /campaigns/:campaignId/candidates - profile  - Should allow filtering by age range
< GET /campaigns/:campaignId/candidates - profile  - Should allow filtering by gender
< GET /campaigns/:campaignId/candidates - profile  - Should allow filtering by maximum age
< GET /campaigns/:campaignId/candidates - profile  - Should allow filtering by minimum age
< GET /campaigns/:campaignId/candidates - profile  - Should allow filtering by multiple genders
< GET /campaigns/:campaignId/candidates - profile  - Should answer with the ages
< GET /campaigns/:campaignId/candidates - profile  - Should aswer with the genders
< GET /campaigns/:campaignId/candidates - questions  - Should allow filtering by bug hunting level
< GET /campaigns/:campaignId/candidates - questions  - Should allow filtering by multiple bug hunting level
< GET /campaigns/:campaignId/candidates - questions  - Should allow filtering by multiple question
< GET /campaigns/:campaignId/candidates - questions  - Should allow filtering by question
< GET /campaigns/:campaignId/candidates - questions  - Should return bug hunting level

> GET /campaigns/:campaignId/candidates  - should answer a list of experience points 
> GET /campaigns/:campaignId/candidates  - should answer a list of levels